#!/usr/bin/env python3

import sys

input = iter(sys.stdin.read().splitlines()).__next__

sys.setrecursionlimit(10000)

R = int(input())

res = -1
if R <= 599:
   res = 8
elif R <= 799:
   res = 7
elif R <= 999:
   res = 6
elif R <= 1199:
   res = 5
elif R <= 1399:
   res = 4
elif R <= 1599:
   res = 3
elif R <= 1799:
   res = 2
elif R <= 1999:
   res = 1

   
print(res) import sys sys input = iter(sys.stdin.read().splitlines()).__next__ input iter(sys.stdin.read().splitlines()).__next__ (sys.stdin.read().splitlines()) iter sys.stdin.read().splitlines() sys.stdin.read().splitlines sys.stdin.read() sys.stdin.read sys.stdin sys stdin read splitlines __next__ sys.setrecursionlimit(10000) sys.setrecursionlimit sys setrecursionlimit 10000 R = int(input()) R int(input()) int input() input res = -1 res -1 if R <= 599:
   res = 8
elif R <= 799:
   res = 7
elif R <= 999:
   res = 6
elif R <= 1199:
   res = 5
elif R <= 1399:
   res = 4
elif R <= 1599:
   res = 3
elif R <= 1799:
   res = 2
elif R <= 1999:
   res = 1

    R <= 599 R 599 res = 8 res 8 elif R <= 799:
   res = 7 R <= 799 R 799 res = 7 res 7 elif R <= 999:
   res = 6 R <= 999 R 999 res = 6 res 6 elif R <= 1199:
   res = 5 R <= 1199 R 1199 res = 5 res 5 elif R <= 1399:
   res = 4 R <= 1399 R 1399 res = 4 res 4 elif R <= 1599:
   res = 3 R <= 1599 R 1599 res = 3 res 3 elif R <= 1799:
   res = 2 R <= 1799 R 1799 res = 2 res 2 elif R <= 1999:
   res = 1

    R <= 1999 R 1999 res = 1 res 1 print(res) print res res = 2 2 res input = iter(sys.stdin.read().splitlines()).__next__ iter(sys.stdin.read().splitlines()).__next__ input res = 4 4 res res = 1 1 res res = -1 -1 res res = 5 5 res res = 3 3 res res = 8 8 res res = 7 7 res res = 6 6 res R = int(input()) int(input()) R
#!/usr/bin/env python3

import sys

input = iter(sys.stdin.read().splitlines()).__next__

sys.setrecursionlimit(10000)

R = int(input())

res = -1
if R <= 599:
   res = 8
elif R <= 799:
   res = 7
elif R <= 999:
   res = 6
elif R <= 1199:
   res = 5
elif R <= 1399:
   res = 4
elif R <= 1599:
   res = 3
elif R <= 1799:
   res = 2
elif R <= 1999:
   res = 1

   
print(res)
